code: def setUp(self):
      # Ensure that IsolatedAsyncioTestCase instances are destroyed before
      # starting a new event loop
      self.addCleanup(support.gc_collect)
  
imports: import asyncio
  import contextvars
  import unittest
  from test import support
label_desc: Use image node_id 1 for calling the TestAsyncCase obj's underlying member method code with example usage: obj.setUp() without return types